Loose-leaf binder



A ril 5. 1927.

. F- J. vl-IRUSKA LOOSE LEAF pmnpn' 2 Sheets-Sheet 1 Filed Sept. 18.1920' I m. -..M,

. l I l| the binder 'onjtlie line 33-in Fig. 1.

Patented, Aprr5, 1927. I i

TUNMTE PAT- FRANK J. HRUSKA, or cEnA'R RABIDs, IOWA,.ASSIG1\TOR TO LEFEBuRE nnnena.oolvr- FFWE.

retr .orcEnAR RAPIDS; IIOWAQHA rCORIORATION oEyIowA.

Loose-LEAF BINDER.

i Appliriation'filed September 18, "1920. serial'No. l ll ',098.-

Tt'is desirable with loose leafbinders that tails whiclrwill a'pear11'1016 fully-from the.-

specifie'ation and'c'laiins. i

The 'ina entien is illustrated in the accompa'nyin'gtlrawings as followsFig.1-shows a section on the line 1-1 in Fig.'3.'. i v

Fig; 2a; lanview of'the' book with the back expan'c ed. 1

Fig. 3 a section on"the1i'ne3'-3 in Fig. 1..

4 a section on the line/4+4 in Fig. 3 ona larger'scale than "thepreceding figures. I f

Figle an enlarged sectionof 'one end Fig. 6 an enlarged "plan View 'of'one end of the binder with the coversand parts re- :111OV8 Cl"t'Ob8t-t6I show construction. H

.1' inarks the back plate of the binder. This-*has 'aslig'ht depression2 adjacent to the. ends and upeturnedflanges' 3 at the ends.- The"movable -'side plates 4 have "the upi at the top with an outwardly bentlip 6 covers "-10. the hinge pin 11 extending through the projections.

Posts 12 are secured to the up-t-urned flanges 5 of the side plates 4near the upper ends of these flanges.

End plates 13 have an inward-turned flange 14L around their outer edgeand are secured to the side plates by rivets 15. There are two of theend plates 13 at each end of the binder.

A guide flange 16 witha base portion at an angle thereto is secured byrivet-s 18 t0 the back plate at each end of the binder, thescrew-bearing posts. 19 extending upwardly from the said base portions.The rivets l8 extend-through a guide plate 20. the guide plate being afolded piece of metal as clearly shown in section. A distance plate niitthe guide plates to passxthe plate. 20

lllhe outer end of the guide plate 520. is i turned mama over so as tostiffen it and extends the full.

width of the back in the depressionz2. 1

"Links 21 aresecured to the side plates by pins 22 and extend intothe'zforked :ends' 23 of :the nuts 24 arranged on the screwrod 25. .Thelinks'2'l are secured in the :forked ends 'by pivot ipins 23. a rightand left screw so that-the nuts rat each end'or" thescrew roda-re"forcedtoward the center or away from the center :simultaneou'sly andthe action of the nuts'iacting through the links spreads or drawstogether the side'plates. i

a The screw isdocked againstanial move-f noentv by engaging the washer26 arranged against the face of the post 19',tl1e end 01? the screw rodbeing, slightly reducedin z size so as to form'a shoulder which shoulderplate 4, being disposed I The screw and lhas resting against the washerprevents an axial movement 'of the screw. vided with theguid'eQT at thecenter, the

the back plate. The screw has the squared ends 29, each end being squareso as to permit-of the operation of the book from either end. stop pin25 which limits the movement (if and 30 respectively to permit ofthe'insertion of the key. so as to engage the squared end.

of the side plates and the side plates cannot be brought Very closelytogether and further The screw is pro- The "screw is also provid'ed withthe With as device it: ain be seen that the guide being carried by apost 28 secured E ini the nut 24. The guide plate and end .flange i oftheback plate have the peiiforations As ordinarily I the links do notform as effective a guiding means as the side plates are extended totheir outer position.

I prefer to cover the screw mechanism with a pad 32. This is ordinarilyformed of metal and secured to the posts 19 by screws 32. The pad 32 issurfaced with a ribbed cover such as corduroy cloth 83 with the ribsextending lengthwise so that the leaves 84: ofthe book engaging these"ribs are maintained in position preventing them from sl pping out ofpo'sltlon when to the side plates from the same side of the nect-edfThis permits greater portion of the links into direct con- 1- the bookisexpanded and the leaves are loosened as they are when used in posting.

. It -willbe noted also that thellinks extend nut as the side plate towhich they are conof bringing the tact with. the bottom, portion .oftheside plates. It will be readily seen that as strain is put upon'theupper edges'ofthe side plates this tends to bend them outwardly and thisbearingof the links holds them in place.

It will also be noted that'the telescoping 1 rods extend back aconsiderable distance vfrom the binding edges. of the side plates andthis allows of a large overlap of the telescoping portions thuspreventing the buckling of these rods. vslightly distanced downwardlyfrom the The rods binding edges thus relieving them from the clampingaction.

' squared at both ends and adapted to receive R'Itwi1l be observed thatthe screw is I thekeyso thatit may be-o'oerated from 7 portion 1*.

-' end is out of order" the other screwmay be utilized;

It will also be observed that the metal 7 forming the back plate isflat/thus permiteith'er; end as may be convenient andifone ting of its.use to form a flat back binder J "when desired. If desired thebinder maybe. 40

made what is commonly known as a roundback binder'by adding the pad orrounded What I claimisz- I 1. In a loose leaf binder, the'combination ofmovable side plates; guides for said are end of i the plates; a screwrod extending lengthwise of said plates; nuts on the screw rod; linksconnecting the screw rod with the side plates; a paper support mountedabove the side platesandstationary with the guides; nd telescoping postsmounted above the paper support 2. In a loose leaf binder, thecombination of movable side plates; guides for said plates; a screw rodextending lengthwise of said plates; nuts on the screw rod; linksconnecting the screw rod with the side plates; a paper support mountedabove the side plates, said support having a ribbed surface, the ribsextending lengthwise of the support; and telescoping posts arrangedabove the paper support.

3. In a loose leaf binder, the combination of movable side plates; aguide for said plates; a screw rod mounted above said plates; posts -inwhich the screw rod is mounted extending from the guides; nuts mountedon the screw rod; links connecting the nuts with the side plates; apaper support mountedon said posts; and telescoping posts extendingbetween the side plates above the paper support.

l. in aloose leaf binder, the combination of a back plate having anupturned flange;

a guide flange arranged within the upturned flange having a baseportion; a

FRANK J. HRUSKA. I

